<?php

namespace Common\Org\Pay\Driver\jdpay\common;

include 'BytesUtils.php';

/**
 * PHP版DES加解密类
 * 可与java的DES(DESede/CBC/PKCS5Padding)加密方式兼容
 */
class DesUtils
{

    public function encrypt($input, $key)
    {
        $key = base64_decode($key);

        $key = $this->pad2Length($key, 8);

        $size = mcrypt_get_block_size('des', 'ecb');
        $input = $this->pkcs5_pad($input, $size);
        $td = mcrypt_module_open('des', '', 'ecb', '');
        $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        @mcrypt_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = base64_encode($data);
        return $data;
    }

    public function decrypt($encrypted, $key)
    {
        $encrypted = base64_decode($encrypted);
        $key = base64_decode($key);
        $key = $this->pad2Length($key, 8);
        $td = mcrypt_module_open('des', '', 'ecb', '');
        // 使用MCRYPT_DES算法,cbc模式
        $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        $ks = mcrypt_enc_get_key_size($td);
        @mcrypt_generic_init($td, $key, $iv);
        // 初始处理
        $decrypted = mdecrypt_generic($td, $encrypted);
        // 解密
        mcrypt_generic_deinit($td);
        // 结束
        mcrypt_module_close($td);
        $y = $this->pkcs5_unpad($decrypted);
        return $y;
    }

    function pad2Length($text, $padlen)
    {
        $len = strlen($text) % $padlen;
        $res = $text;
        $span = $padlen - $len;
        for ($i = 0; $i < $span; $i++) {
            $res .= chr($span);
        }
        return $res;
    }

    function pkcs5_pad($text, $blocksize)
    {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }

    function pkcs5_unpad($text)
    {
        $pad = ord($text{strlen($text) - 1});
        if ($pad > strlen($text))
            return false;
        if (strspn($text, chr($pad), strlen($text) - $pad) != $pad)
            return false;
        return substr($text, 0, -1 * $pad);
    }
}


/*$key1 = "Z8KMT8cT4z5ruu89znxFhRP4DdDBqLUH";
$input1 = "BbCcsyU1/y229HyvxDT5FmRVucHTWPRjhhrZebEmpMP//lcum8r0QuXFr6Ox695wMtF0nS0XxcaV
9Sh1gkaMzuRGAz+s+c9hXDEg1AW5STcyQ3G7Q6Jw9Aj2LWFizT9qCQaujOQPOtOZ22EavG6s5RX/
8sp3bRJkxJ6zCbT7rL4jsIfoFONAt0HWUXQJbk4Akse+WwzcrmNPP5s1W2rDORp9gw0qUaUoCfgM
NKHcXblveVeVcYxyA0rkFOq6qHWKrlHjDgjUittRYAOBbP4L2CI5o+wLC3iWVy6eiLwvBsIyc7jl
ScajsZNH1x9OmHTV+WXP5z0ez7XoE5HbTh0frGZxDYSl0fT/2y/P1inykUJpBKbVp7sl85Urf5Sr
Ydc4W04AwIj246pi9mJPu6wL6lnUWn3uzcOlCELiZBz92nyr7jyXyr3GNGkEptWnuyXzxWWp31o3
cf0Y0Y3+0bcnnA==";
$crypt = new DesUtils();*/
//echo "Decode:".$crypt->encrypt("hahdddddd",$key1);
//echo "Decode:".$crypt->decrypt($input1,$key1);
?>